Acoustic insulation boards



FIG. 1 is a perspective view of an acoustic insulation board in accordance with the design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof; and,

FIG. 4 is a front elevation view thereof, with the left, right, and back elevation views being identical to the front elevation view. 

CLAIM The ornamental design for an acoustic insulation board, as shown and described. 